RE XXX18 -- Up or Down Firing? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 6 Old 05-17-2012, 06:36 AM - Thread Starter
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I am sticking an 18" RE Audio XXX in an 11.5 Cu.Ft Sealed Sonotube enclosure (with 1 lb of polyfil per Cu.Ft). Based on the weight of the cone and the looseness/tightness of the suspension, would I be better served to place the driver firing up or down, or is it a wash? My concern is the useable life of the driver. I want to maximize that. Thank you for any help.
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post #2 of 6 Old 05-17-2012, 08:44 AM
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I cant comment on the longevity of the driver's life in either orientation, as ive only had mine a few months, and they are side-firing. All I can say is you better give it plenty of room for that excursion if you down-fire!!

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post #3 of 6 Old 05-17-2012, 08:45 AM - Thread Starter
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Good tip. Thanks beastaudio.
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post #4 of 6 Old 05-17-2012, 09:07 AM
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According to the spec that I have on the XXX18, modeled in Unibox, I see a 2% loss in linear travel when used downfiring (or up, I'd assume). Sounds like you'd be okay for regular use but it's hard to say about the long term implementation. The XXX18 has a pretty high moving mass so it could sag over time.

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post #5 of 6 Old 05-17-2012, 09:10 AM - Thread Starter
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Scott-- Thank you. If I hear what you are saying, the sag will happen with either configuration, up or down firing, so the correct comparison is with up/down versus side-firing. That makes sense, and since I am going up or down, I guess my initial question is flawed! Thanks again.
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post #6 of 6 Old 05-17-2012, 09:13 AM
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Quote:
Originally Posted by Prmntgen View Post

Good tip. Thanks beastaudio.

I will say with the surround and suspension being as stiff as it is, you shouldnt have a problem with either orientation. Just make sure you blow it around the 2 year mark, and get ya another

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